package app

import (
	"context"
	"fmt"
	"io"

	"gitea.maximumdirect.net/eric/distributor/internal/config"
)

type RunOptions struct {
	ConfigPath string
	DryRun     bool
	Stdout     io.Writer
}

func Run(ctx context.Context, options RunOptions) error {
	if err := ctx.Err(); err != nil {
		return err
	}
	if !options.DryRun {
		return fmt.Errorf("run command: %w", ErrNotImplemented)
	}

	configPath := options.ConfigPath
	if configPath == "" {
		configPath = config.DefaultConfigPath
	}
	cfg, err := config.LoadFile(configPath)
	if err != nil {
		return err
	}
	return writeRunSummary(options.Stdout, cfg)
}

func writeRunSummary(w io.Writer, cfg config.Config) error {
	if w == nil {
		return nil
	}
	if _, err := fmt.Fprintf(w, "Configured pipelines: %d\n", len(cfg.Pipelines)); err != nil {
		return err
	}
	for _, pipeline := range cfg.Pipelines {
		if _, err := fmt.Fprintf(w, "- %s: source=%s destinations=%d\n", pipeline.ID, pipeline.Source.Backend, len(pipeline.Destinations)); err != nil {
			return err
		}
		for _, destination := range pipeline.Destinations {
			if _, err := fmt.Fprintf(w, "  - %s: backend=%s publish_source=%t publish_html=%t\n", destination.ID, destination.Backend, destination.Publish.Source, destination.Publish.HTML); err != nil {
				return err
			}
		}
	}
	return nil
}